191228597 has 32 divisors (see below), whose sum is σ = 246758400. Its totient is φ = 144246528.

The previous prime is 191228591. The next prime is 191228621. The reversal of 191228597 is 795822191.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 191228597 - 2⁸ = 191228341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191228591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187154 + ... + 188172.

It is an arithmetic number, because the mean of its divisors is an integer number (7711200).

Almost surely, 2^191228597 is an apocalyptic number.

191228597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

191228597 is a deficient number, since it is larger than the sum of its proper divisors (55529803).

191228597 is a wasteful number, since it uses less digits than its factorization.

191228597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145.

The product of its digits is 90720, while the sum is 44.

The square root of 191228597 is about 13828.5428371900. The cubic root of 191228597 is about 576.1261830115.

The spelling of 191228597 in words is "one hundred ninety-one million, two hundred twenty-eight thousand, five hundred ninety-seven".